Means for control of electric impulses



250-201 AU 252 Ex FIPBZIZ XR 195239159 j 13.192s.- "1.523.149 E. B. WHEELER j e v HEARS FOR CONTROL be 330mm ims'ss Filed Nov. 15, 1923 Wen/er: Edmund 5 Wheeler: ey M W v EXAMINER Patented Jan. 13, 1925.

UNITED STATES PATENT OFFICE.

mums. WHEELER, OF NEW YORK, N. Y., ASSIGNOB 1'0 WESTERN WC GOI- rm, INCORPORATED, 01 new YORK,

I. Y., A CORPORATION 01 m YORK.

m8 303 CONTROL ELMTRIC IIPUIBES.

Application fled November 15, 1928. Io. 674,900.

To all whom it may concern:

Be it known that I, EDMUND B. WHEELER, a citizen of the United States, residilx g at New York, in the county of New ork State of New York, have invented certain new and useful Improvements in Means for Control of Electric Impulses, of which the following is a full, clear, concise, and exact description.

This invention relates to means for control of electric impulses.

An object of this invention is to produce pulses as a means for indicating time intervals.

Another object of the invention is to produce a source of electrical impulses of equal intervals and equal duration for mdicating time.

A further object is to reduce a succession of ually spaced e ectrical impulses and to utilize these impulses to control the motion of an oscillatory body.

=Another object'is to reduce electrical impulses under control 0 a pendulum and to utilize the impulses for maintaining the pendulum in continuous and constant oscillation. i

A feature of this invention is themeansutilized to cause electrical ulses to drive a pendulum which is con uctively independent of an electrical circuit.

Another feature of the invention relates to means for imparting to an 090' body a single driving impulse correspon ing to a pluralit of electrical impulses erated under t e control of said oscilating body. more specific feature of the invention relates to a system of relays sup flied with energy from an amplifier contro ed by a swinging dulum for oper a driving solenoid once for each oscillation of the pendulum.

This system may comprise a relay for closing an electric circuit which relay ma be ofigrated by energy from a thermiomc amp er arranged to be controlled by the action of a of light im ressed upon a photo-electnc cell connects in the input circuit of the am hfier. In order to cause the relay to pr uce a succession of electrical impulses which shall be of equal duration and separated by equal intervals, an 7 oscillating pendulum provided with an upon the photo-electric cell. This interception takes place preferabl at the midint of the oscillation of t e pendulum. t is thus evident that the light beam is twice intercepted for each .oscillation of the pendulum. The rela is thereby caused to produce two pulses or each oscillation of the ndulum.

The 7 am of light may comprise rays not only within the visible spectrum but also ultraviolet or infra red rays or the shorter electromagnetic rays such as X-rays and gamma rays. The opaque body ma be of any material not transparent to e particular rays used. Thus when X-rays are used it may be for example lead.

The invention provides a system of re lays controlled by the first mentioned relay. for obtaining a single pulse for each two cession of equal electrical impulses and formaintaining a pendulum in continuous oscillation under control of these impulses.

Fig. 2, a view of the portion of the pendulum indicating the arrangement of the driving solenoidmnd the opaque body.

Referring to Figures 1 and 2, the pendulum 10 is arranged to oscillate atright angles to a beam of light 11 from the source 12. An opaque body 13 is mounted on the dulum in such manner as to intercept the-beam of light preferably when the pendulum is at the mid point of its swing. A lens and shutter 15 and 16, respectively, are

arranged to focus the beam of'light from pulses of the first mentioned rela These charge ranged to operate armatures' 2A and 44 forming a portion of external electric circuits.

The relay 23 controls by means of its armature 24 the operation of a pair of relays 26 and 27 having double windings. Relay 26 has two inductive windings and relay 27 has one inductive and one noninductive winding. The latter winding is connected in shunt to one winding of rela 26, whereas the inductive winding of re ay 27 is arranged in series between the two windings of relay 26. The relays 26 and 27 control armatures 28 and 31 connected in the circuit of solenoid 33. The front armature 30 of relay 27 sup lies a shunt-path to ground for causing t e release of relays 26 and 27. Armature 25 of relay 26 is arranged to control the 'operating circuit of relay 27 and-the locking circuit of relay 26.

A battery 35 is provided for energizing solenoid 33. I

The armature 34 of solenoid 33 consists of a hook-shaped bar of magnetic material attached to the lower end of pendulum 10 in such manner that as the pendulum swings, one end of the hook or armature 34 is mserted in and withdrawn from the solenoid. The system: operates as follows: The photo-electric cell and the light source are so arranged that the light from the lamp 12 is constantly focused on the photo-electric cell 17 by means of the lens 15 except for a momentary interval when the opaque body 13 of the pendulum 10 cuts ofi the light at the mid point of the swing. The battery 18 and cell 17 are so adjusted that the potential impressed upon the grid of tube 21 is suificiently negative to revent the flow of space current from the. lament tive. momentarily cuts ofi the lig t from photoelectric cell 17 the resistance of the cell becomes instantly substantially infinite. The on the grid of tube 21 leaks ofi through resistance "22 and space current flows from plate to filament and in the external circuit connected between them causin the operation of relay 23.

elay 23 on operation closes the contacts of armatures 24 and 44. Armature 44 may be arranged to provide impulses in any desired external circuit connected thereto. Armature 24, which is connected to ground, closes the circuit of relay 27 which closes its own locking circuit by contact of armature '30. Armature 31 of relay 27 closes the circuit of solenoid 33.

It will be remembered that at this instant the endulum 10 is at the mid point of its osci tion. When the 0 8411110 13 passes out of the path of t 11, p otoelectric cell 17 is sensitized thereuptn by CROSS REFERENCE tween pulses may to the late. Bela 23 is therefore ingpcra owever, w en the o que b y 13 control EXAMINER light from the source 12. This reestablishes the negative potential of the grid of tube 21 causing the deenergization of relay 23 and its consequent release.

Upon release of this relay armature 24 opens its associated contact which has maintained a short circuit upon one winding of relay 26 so that now relay 26 is operate by current from battery 29 flowing to ground via the inner contact of armature 30. The operation of relay 26 opens the circuit 32 of solenoid 33 at t and prepares the release circuit of relay 27 at the front contact of armature 25. At the next operation of relay 23, relay 27 is connected in a short circuit as follows: Ground, contact of armature 24, front contact of armature 25,-inductive winding of relay 27, non-inductive windin of relay 27 an inductive winding of re ay 26 in tact of armature 30 to groun thereupon releases, opening a contact in its locking circuit at the armature 30. Upon the subsequent release of relay 23, relay 26 is released and the system restored to its normal condition. This cycle of operation recurs for every oscillation of the pendulum 10.

The duration of the pulses produced in circuit 32 and in the circuit connected to the contact armature 44 may be determined by adjusting the size of the o ue element 13 so that the light beam 11 wi be cut off from the photo-electric cell for longer or shorter intervals. The length of bebe determined y ad'usting the period of the pendulum 10. his may be accomplished by varying the position or magnitude of a weig t 14 attached to the pen ulum. Thus it is evident that pulses of any desired duration or interval may be obtained.

The ent of this invention described and-illustrated is merely representative of the application of the rinciples involved and is not to be construed as limitits scope.

V11at is claimed is:

1.'In a time signal system which comprises means for intercepting a beam of light at equal time intervals, means sensitive to said light beam and means for producing electrical pulses in accordance with the interception of said light beam and additional means for. causing said pulses to actuate said means for intercepting a beam of light.

2. A method of producing electrical pulses separated by ual time intervals which comprises producing variations of a light beam, said variations being of constant time period, controlling the flow of electrons'in a space discharge tube in accordance with variations of said beam of light, and causin said electrical pulses to the variations of said light beam.

arallel, con- Relay 27 e contact of armature 28 input circuit and a uasaaa by said light beam, and means plifier for 3. A method of prod with the out u't circuit of said am force upon said penduucing time signals which comprises p ucing a succession of spaced electrical in accordance with the pulses of a light and I controlling the period of pulses of said light I beam by means of mid'electrical pulses.

r 4. A time si al system which comprises means for p ucing a beam of light, a pendulum for interceptinglsaid beam at equal impressing riving 6. The combination of means for producing electrical pulses at equal intervals of time and means for driving a pendulumin accordance with said pulses, said means comprising a solenoid having an armature 1 intervals of time, a oto-electric cell, .arattached to said pendulum, said armature ranged to be sensitized by said beam of being movably posifioned within the coil of said solenoid.

7. The combination with means for roducing electrical pulses, of a relay, a ermionic amplifier connected to said relay and a pendulum for causi the ration of light, said photo-electric cell being con-' nected in the input circuit of a thermionic amplifier 'supplying energy to a relay whereby variations in said lightbeam are caused to control the flow of current in said relay, and means under control of said resaid relay a plurality 0 times urmg each lay for maintaining said pendulum in conoscillation thereof, and means under continuous oscillation;

5. The combination in a time signaling system, a pendulum arr to intercept a beam of light, a thermiomc amplifier com- -trol of said relay for imgressing the driv- 2o ing force upon said pen ulum once for a given plurality of pulses prising an input circuit and an output cirmy name this 12th day of November A. D., cuit, a hoto-electric cell connected in said 1923.

to be sensitized EDMUND BJWHEELER.

of said relay.Sc In witness whereof, I hereunto su ribe 

